I was watching the last scene going "And now there's a flash of light and he steps out... Ok, maybe he'll walk in the door explaining how he got sent back to that morning... Um, he comes in the tent and chides Carter for scaring his bride? Did they really just do that? Holy crap, they did!"

I wouldn't be surprised if they pull a 'Tholian Web' on us, and have Stark pop up every now and then, most likely to Allison. With her being the only one to see him, no one will believe her. Except Carter, who's been there more times than I can count.